DIODES AP2281-1FMG-7

AP2281
Single Slew Rate Controlled Load Switch
Description
Features
•
•
•
•
•
•
•
•
•
•
Wide input voltage range: 1.5V – 6V
Low RDS(ON): 80mΩ typical @ 5V
Turn-on slew rate controlled
AP2281-1: 1ms turn-on rise time
AP2281-3: 100us turn-on rise time with internal discharge
Very low turn-on quiescent current: << 1uA
Fast load discharge option
Temperature range -40ºC to 85°C
SOT26 and DFN2018-6: Available in “Green” Molding
Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
The AP2281 slew rate controlled load switch is a single P-channel
MOSFET power switch designed for high-side load-switching
applications. The MOSFET has a typical RDS(ON) of 80mΩ at 5V,
allowing increased load current handling capacity with a low
forward voltage drop. The turn-on slew rate of the device is
controlled internally.
The AP2281 load switch is designed to operate from 1.5V to 6V,
making it ideal for 1.8V, 2.5V, 3.3V, and 5V systems. The typical
quiescent supply current is only 0.01uA.
Applications
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•
•
•
•
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Smart Phones
PDA
Cell Phones
GPS Navigators
PMP/MP4
Notebook and Pocket PC
Ordering Information
AP2281 - X XX G - 7
Turn-on rise time
Package
Green
1 : 1ms
3 : 100us
W : SOT26
FM : DFN2018-6
G : Green
Device
AP2281-1WG-7
AP2281-3WG-7
AP2281-1FMG-7
AP2281-3FMG-7
Notes:
Package
Code
W
W
FM
FM
Packaging
(Note 2)
SOT26
SOT26
DFN2018-6
DFN2018-6
Packing
7 : Tape & Reel
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
3000/Tape & Reel
-7
3000/Tape & Reel
-7
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf
AP2281 Rev. 4
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AP2281
Single Slew Rate Programmable Load Switch
Pin Assignments
(Top View)
( Top View )
OUT 1
6 IN
IN
1
6
OUT
5 GND
IN
2
5
OUT
EN
3
4
GND
GND 2
EN 3
4 IN
DFN2018-6
SOT26
Pin Description
Pin Number
Pin Name
Description
SOT26
DFN2018-6
OUT
1
5, 6
GND
2, 5
4
Ground.
EN
3
3
Enable input, active high
IN
4, 6
1, 2
Voltage output pin. This is the pin to the P-channel MOSFET drain
connection. Bypass to ground through a 0.1uF capacitor.
Voltage input pin. This is the pin to the P-channel MOSFET source.
Bypass to ground through a 1µF capacitor.
Options
Part Number
AP2281-1
AP2281-3
AP2281 Rev. 4
Slew Rate (typ)
1ms
100us
Active pull down
no
yes
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Enable
Active high
Active high
FEBRUARY 2009
© Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
For AP2281-3 only
Block Diagram
Typical Application Circuit
VIN
VOUT
IN
1uF
OUT
0.1uF
Enable
EN
GND
AP2281 Rev. 4
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AP2281
Single Slew Rate Programmable Load Switch
Absolute Maximum Ratings
Symbol
ESD HBM
Parameter
Human Body Model ESD Protection
ESD MM
Machine Model ESD Protection
VIN
VOUT
VEN
Iload
TJ
TST
PD
Notes:
SOT26
DFN2018-6
Input Voltage
Output Voltage
Enable Voltage
Maximum Continuous Load Current
Operating Junction Temperature Range
Storage Temperature Range
SOT26 (Note 3, 4, 5)
Power Dissipation
DFN2018-6 (Note 3, 4, 6)
Ratings
5
500
450
6.5
VIN + 0.3
6.5
2
-40 ~ 125
-65 ~ 150
720
1410
Unit
KV
V
V
V
V
V
A
°C
°C
mW
mW
3. TJ, max =125°C.
4. Ratings apply to ambient temperature at 25°C.
Recommended Operating Conditions
Symbol
VIN
IOUT
TA
AP2281 Rev. 4
Parameter
Input voltage
Output Current
Operating Ambient Temperature
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Min
1.5
0
-40
Max
6.0
2.0
85
Unit
V
A
°C
FEBRUARY 2009
© Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Electrical Characteristics
(TA = 25oC, VIN = 5.0V, unless otherwise stated)
Symbol
Parameters
Test Conditions
Input Quiescent Current
VEN = VIN, IOUT= 0
IQ
Input Shutdown Current
VEN = 0V, OUT open
ISHDN
Input Leakage Current
VEN = 0V, OUT grounded
ILEAK
VIN = 5.0V
VIN = 3.3V
Switch on-resistance
RDS(ON)
VIN = 1.8V
VIN = 1.5V
EN Input Logic Low Voltage
VIN = 1.5V to 6V
VIL
1.5V ≤ VIN ≤ 2.7V
EN
Input
Logic
High
Voltage
2.7V
< VIN < 5.25V
VIH
VIN ≥ 5.25V
VEN = 5V
EN Input leakage
ISINK
Output turn-on delay time
TD(ON)
Rload=10Ω
AP2281-1, Rload=10Ω
Output turn-on rise time
TON
AP2281-3, Rload=10Ω
Output turn-off delay time
Rload=10Ω
TD(OFF)
Discharge FET on-resistance
For AP2281-3 only, VEN = GND
RDISCH
SOT26 (Note 5)
Thermal Resistance
θJA
Junction-to-Ambient
DFN2018-6 (Note 6)
θJC
Notes:
Thermal Resistance
Junction-to-case
Min
⎯
⎯
⎯
Typ.
0.01
0.01
0.01
80
95
160
210
1.4
1.6
1.7
⎯
Max
1
1
1
100
120
210
280
0.4
Unit
μA
μA
μA
mΩ
mΩ
mΩ
mΩ
V
V
V
V
μA
μS
μS
μS
μS
Ω
1
1
1000
100
0.5
65
153
1500
150
1
100
o
C/W
o
C/W
78
SOT26 (Note 5)
29
DFN2018-6 (Note 6)
19
5. Test condition for SOT26: Device mounted on FR-4 substrate PC board, 2oz copper, with minimum recommended pad layout.
6. Test condition for DFN2018-6: Device mounted on FR-4 2-layer board, 2oz copper, with minimum recommended pad on top layer and 3 vias to
bottom layer 1.0"x1.4" ground plane.
AP2281 Rev. 4
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AP2281
Single Slew Rate Programmable Load Switch
Typical Performance Characteristics
Quiescent Current vs. Input Voltage
Quiescent Current vs. Temperature
0.010
Q u ie s c e n t C u rre n t ( μ A )
Quiescent C urrent (μ A )
0.01
0.008
0.006
0.004
0.002
0
1.0
2.0
3.0
4.0
5.0
6.0
VIN=1.8V
VIN=3.3V
0.008
VIN=5.0V
0.006
0.004
0.002
0.000
-50
Input Voltage (V)
-25
0
25
50
75
100
125
Temperature (°C)
RDS(ON) vs. Input Voltage
RDS(ON) vs. Temperature
300.00
200.00
I=100mA
180.00
I=500mA
250.00
160.00
R DS(O N) (m Ω )
R DS(O N) (m Ω )
I=1A
I=2A
200.00
150.00
140.00
120.00
100.00
100.00
2
2.5
3
3.5
4
4.5
5
5.5
60.00
VIN =1.8V
40.00
VIN =3.3V
20.00
VIN =5V
0.00
-50
50.00
1.5
80.00
6
-25
0
Input Voltage (V)
25
50
75
100
Temperature (°C)
ENABLE Threshold vs. Input Voltage
Input Shutdown Current vs. Temperature
1.8
0.008
1.4
IS H D N ( μ A )
O N /O F F T h re s h o ld (V )
0.010
1.6
1.2
1.0
0.8
0.004
0.002
VIL (V)
0.6
0.006
VIH (V)
0.000
0.4
-50
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
0
25
50
75
100
125
Temperature (°C)
Input Voltage (V)
AP2281 Rev. 4
-25
6.0
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AP2281
Single Slew Rate Programmable Load Switch
Typical Performance Characteristics
(Continued)
AP2281-1 Turn-On
AP2281-1 Turn-Off
(VIN=3.3V, RL=7Ω)
(VIN=3.3V, RL=7Ω)
VEN (5V/div)
VEN (5V/div)
VOUT (2V/div)
VOUT (2V/div)
IIN (500mA/div)
IIN (500mA/div)
Time (500μs/div)
Time (50μs/div)
AP2281-1 Turn-On
AP2281-1 Turn-Off
(VIN=5V, RL=10Ω)
(VIN=5V, RL=10Ω)
VEN (5V/div)
VEN (5V/div)
VOUT (2V/div)
VOUT (2V/div)
IIN (500mA/div)
IIN (500mA/div)
Time (500μs/div)
AP2281 Rev. 4
Time (50μs/div)
7 of 13
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AP2281
Single Slew Rate Programmable Load Switch
Typical Performance Characteristics
(Continued)
AP2281-3 Turn-On
AP2281-3 Turn-Off
(VIN=3.3V, RL=7Ω)
(VIN=3.3V, RL=7Ω)
VEN (5V/div)
VEN (5V/div)
VOUT (2V/div)
VOUT (2V/div)
IIN (500mA/div)
IIN (500mA/div)
Time (50μs/div)
Time (50μs/div)
AP2281-3 Turn-On
AP2281-3 Turn-Off
(VIN=5V, RL=10Ω)
(VIN=5V, RL=10Ω)
VEN (5V/div)
VEN (5V/div)
VOUT (2V/div)
VOUT (2V/div)
IIN (500mA/div)
IIN (500mA/div)
Time (50μs/div)
AP2281 Rev. 4
Time (50μs/div)
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AP2281
Single Slew Rate Programmable Load Switch
Application Note
Input Capacitor
Power Dissipation
A 1μF capacitor is recommended to connect between IN
and GND pins to decouple input power supply glitch and
noise. The input capacitor has no specific type or
ESR (Equivalent Series Resistance) requirement.
However, for higher current application, ceramic
capacitors are recommended due to their capability to
withstand input current surges from low impedance
sources, such as batteries in portable applications. This
input capacitor must be located as close as possible to
the device to assure input stability and less noise. For
PCB layout, a wide copper trace is required for both
IN and GND.
The device power dissipation and proper sizing of the
thermal plane is critical to avoid thermal shutdown and
ensure reliable operation. Power dissipation of the
device depends on input voltage and load conditions and
can be calculated by:
Output Capacitor
A 0.1μF capacitor is recommended to connect between
OUT and GND pins to stabilize and accommodate load
transient condition. The output capacitor has no specific
type or ESR requirement. The amount of the
capacitance may be increased without limit. For
PCB layout, the output capacitor must be placed as
close as possible to OUT and GND pins, and keep the
traces as short as possible.
ENABLE/SHUTDOWN Operation
The AP2281 is turned on by setting the EN pin high, and
is turned off by pulling it low. To ensure proper operation,
the signal source used to drive the EN pin must be able
to swing above and below the specified turn-on/off
voltage thresholds listed in the Electrical Characteristics
section under VIL and VIH.
DISCHARGE Operation
The AP2281-3 offers discharge option that helps to
discharge the output charge when disabled.
AP2281 Rev. 4
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PD = IOUT xR DSON
2
(1)
However, the maximum power dissipation that can be
handled by the device depends on the maximum
junction to ambient thermal resistance, maximum
ambient temperature, and maximum device junction
temperature, which can be approximated by the
equation below:
PD ([email protected] TA ) =
( +125°C − TA )
θ JA
(2)
For example at VIN = 5V, the typical RDSON = 80mΩ. For
IOUT = 2A, the maximum power dissipation calculated
using equation (1) is PD = 0.32W. Based on SOT26
θJA = 153°C/W and equation (2), the calculated junction
temperature rise from ambient is approximately 49°C.
Since the maximum junction temperature is 125°C, the
operating ambient temperature must be kept below 76°C
to safely operate the device.
On the other hand, at TA = 85°C and VIN = 5V, the
calculated maximum power dissipation from equation (2)
is approximately PDmax = 0.26W. Hence the safe
operating maximum continuous current is 1.81A. For
other application conditions, the users should
recalculate the device maximum power dissipation
based on the operating conditions.
FEBRUARY 2009
© Diodes Incorporated
AP2281
Single Slew Rate Programmable Load Switch
Marking Information
(1) SOT26
( Top View )
4
7
5
6
XX : Identification code
Y : Year 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : A~Z : Green
XX Y W X
1
2
3
Device
Package type
Identification Code
AP2281-1W
AP2281-3W
SOT26
SOT26
U2
U3
(2) DFN2018-6
( Top View )
.
AP2281 Rev. 4
XX
YWX
XX : Identification code
Y : Year 0~9
W : Week : A~Z : 1~26 week;
a~z : 27~52 week; z represents
52 and 53 week
X : A~Z : Green
Device
Package type
Identification Code
AP2281-1FM
AP2281-3FM
DFN2018-6
DFN2018-6
UE
UF
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AP2281
Single Slew Rate Programmable Load Switch
Package Information
(1) Package type: SOT26
AP2281 Rev. 4
11 of 13
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AP2281
Single Slew Rate Programmable Load Switch
Package Information
(Continued)
0.08 C
0.13Typ
Seating P lane
2X0.25 A
6X -
0/0.05
0.10 C
0.545/0.605
(2) Package type: DFN2018-6
S id e V ie w
C
1.75 /1.875
B
A
Pin #1 ID
1.3/1.5
CL
0.9/1.1
1.95/2.075
0.2/0.3
CL
0.30T yp
2X -
0.25 B
0.50 T yp
0.15/0.25
0.10
C A B
B o tto m V ie w
AP2281 Rev. 4
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AP2281
Single Slew Rate Programmable Load Switch
Taping Orientation
Notes:
7. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf
IMPORTANT NOTICE
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further
notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither
does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will
agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages.
LIFE SUPPORT
Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the
President of Diodes Incorporated.
AP2281 Rev. 4
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